package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.SystemConstants;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.autoconfigure.cache.CacheProperties;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result sendCode(String phone) {
        //1.检验手机号
        if(RegexUtils.isPhoneInvalid(phone)) {
            //2.如果不符合,返回错误信息
            return Result.fail("手机号格式错误!");
        }
        //3.符合，生成验证码
        String code = RandomUtil.randomNumbers(6);

        //4.保存验证码到redis // set key value ex 120
        stringRedisTemplate.opsForValue().set(RedisConstants.LOGIN_CODE_KEY +phone,code,RedisConstants.LOGIN_CODE_TTL, TimeUnit.MINUTES);

        //5.发送验证码
        log.debug("发送短信验证码成功，验证码：{}",code);

        return Result.ok();
    }


    @Override
    public Result login(LoginFormDTO loginForm) {
        String phone = loginForm.getPhone();
        //1.检验手机号
        if(RegexUtils.isPhoneInvalid(phone)) {
            //2.如果不符合,返回错误信息
            return Result.fail("手机号格式错误!");
        }

        //3.从redis获取验证码并校验
        String cacheCode = stringRedisTemplate.opsForValue().get(RedisConstants.LOGIN_CODE_KEY + phone);
        String code = loginForm.getCode();
        if(cacheCode == null || !cacheCode.equals(code)) {
            //不一致,报错
            return Result.fail("验证码错误!");
        }
        //4.一致
        User user = query().eq("phone",phone).one();

        //5.判断用户是否存在
        if(user==null) {
            //6.不存在,创建新用户并保存
            user = createUserWithPhone(phone);
        }

        //7.保存用户到redis中
        //7.1 随机生成token,作为登录令牌
        String token = UUID.randomUUID().toString(true);
        //7.2 将user对象转为HashMap存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName,fieldValue) -> fieldValue.toString()));
        //id字段类型是Long,这个怎么解决? 自己new 一个Map 或者还是用这个工具类
        //7.3 存储
        stringRedisTemplate.opsForHash().putAll(RedisConstants.LOGIN_USER_KEY+token,userMap);

        //7.4 设置token有效期
        stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY+token,RedisConstants.LOGIN_USER_TTL,TimeUnit.SECONDS);

        //8.返回token
        return Result.ok(token);

    }

    private User createUserWithPhone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName(SystemConstants.USER_NICK_NAME_PREFIX+RandomUtil.randomString(6));
        save(user);
        return user;
    }
}













